package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.exception.BusinessException;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;
    /**
     * 用户下单
     * @param orders
     */
    @Override
    public void submit(Orders orders) {
        //获取当前用户的id,在ThreadLocal中存放着
        Long userId = BaseContext.getCurrentId();

        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> wra = new LambdaQueryWrapper<>();
        wra.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> list = shoppingCartService.list(wra);
          //判断购物车是否为空
        if(list==null||list.size()==0){
            throw new BusinessException("购物车,不能为空,请重新下单");
        }
          //查询用户数据
        User user = userService.getById(userId);

        //查询地址数据
        Long bookId = orders.getAddressBookId();
        AddressBook byId = addressBookService.getById(bookId);
          //地址不能为空
        if(byId==null){
            throw new BusinessException("用户地址信息有误,不能下单");
        }
          //随机生成订单号
        long orderId = IdWorker.getId();

        //原子类型,确定数据在多线程共享下是安全的
        AtomicInteger integer = new AtomicInteger(0);

        //组装订单明细信息
        List<OrderDetail> orderDetails = list.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            integer.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //组装订单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(integer.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(byId.getConsignee());
        orders.setPhone(byId.getPhone());
        orders.setAddress((byId.getProvinceName() == null ? "" : byId.getProvinceName())
                + (byId.getCityName() == null ? "" : byId.getCityName())
                + (byId.getDistrictName() == null ? "" : byId.getDistrictName())
                + (byId.getDetail() == null ? "" : byId.getDetail()));

        //向订单表插入数据,一条数据
        this.save(orders);
        //向订单表明细插入数据,多条数据
        orderDetailService.saveBatch(orderDetails);

        //清空购物车数据
         shoppingCartService.remove(wra);
    }
}
